Question

metals and non metals chapter class 8 notes atleast of 3 pages

Answer 1

Everything around us can be categorized into two types of elements- metals or non-metals. Take a look…your book, your clothes, your pencil, your water bottle, your bag, the blackboard, the door and even your tiffin and the contents of it! Complex yes, but when broken down to its most basic form, on the basis of their physical attributes and chemical makeup, everything is either a metal or a non-metal. So, in Class 8 studying the functionalities of Metals and Non-Metals is very important.

Thus, it is very important to know what metals and non-metals are and how to distinguish between them.

Getting to know the periodic table

The periodic table is an arrangement of elements on the basis of certain chemical properties. In a row, generally, the metals are arranged on the left side and the non-metals on the right side. Table rows are periods and columns are called groups. Note that there are 92 elements that occur naturally out of which 70 are metals and 22 are non-metals.

Metals

As you can see from the above depiction of the periodic table, most of the elements are metals. There are various kinds of metals

alkaline earth metals,

alkali metals,

transition metals,

actinides, and

Lanthanides

Metals on the left-hand side of the periodic table are distinguished from non-metals on the periodic table by a zigzag line that starts from carbon and runs down phosphorus, selenium, iodine, till radon. Therefore these chemical elements and everything on their right is non-metal and the row just to their left is known as semi-metals or metalloids. They have the combined properties of both metals and non-metals

Answer 2

Answer:

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